(Solved) : 4 Describe Least 3 Cases Think Test Trying Determine 12 Hour 24 Hour Clock Works Correctly Q44133474 . . .
4) Describe at least 3 cases that you think we shouldtest if we are trying to determine if the 12-hour/24-hour clockworks correctly. In each case, describe in English what the testconsists of, what you think getTime should return, and why youchose that test. You do not need to write the code.
Here is the code that that this question refers to.
ClockDisplay.java
public class ClockDisplay
{
private NumberDisplay hours;
private NumberDisplay minutes;
private String displayString; // simulates the actual display
private boolean twelveHourDisplay;
/**
* Constructor for ClockDisplay objects. This constructor
* creates a new clock set at 00:00.
*/
public ClockDisplay()
{
hours = new NumberDisplay(24);
minutes = new NumberDisplay(60);
updateDisplay();
twelveHourDisplay=false;
}
/**
* Constructor for ClockDisplay objects. This constructor
* creates a new clock set at the time specified by the
* parameters.
*/
public ClockDisplay(int hour, int minute)
{
hours = new NumberDisplay(24);
minutes = new NumberDisplay(60);
setTime(hour, minute);
twelveHourDisplay=false;
}
/**
* This method should get called once every minute – it makes
* the clock display go one minute forward.
*/
public void timeTick()
{
minutes.increment();
if(minutes.getValue() == 0) { // it just rolled over!
hours.increment();
}
updateDisplay();
}
/**
* Set the time of the display to the specified hour and
* minute.
*/
public void setTime(int hour, int minute)
{
hours.setValue(hour);
minutes.setValue(minute);
updateDisplay();
}
/**
* Return the current time of this display in the formatHH:MM.
*/
public String getTime()
{
return displayString;
}
public void toggleDisplay()
{
if(twelveHourDisplay)
{
twelveHourDisplay=false;
}
else
{
twelveHourDisplay=true;
}
updateDisplay();
}
/**
* Update the internal string that represents the display.
*/
private void updateDisplay()
{
int h=Integer.parseInt(hours.getDisplayValue());
if(twelveHourDisplay)
{
if(h>12)
{
h=h-12;
displayString = h + “:” + minutes.getDisplayValue()+”:”+”PM”;
}
else
displayString = h + “:” + minutes.getDisplayValue()+”:”+”AM”;
}
else
displayString = hours.getDisplayValue() + “:” +
minutes.getDisplayValue();
}
}
NumberDisplay.java
public class NumberDisplay
{
private int limit;
private int value;
/**
* Constructor for objects of class NumberDisplay
*/
public NumberDisplay(int rollOverLimit)
{
limit = rollOverLimit;
value = 0;
}
public int getValue()
{
return value;
}
/**
* Set the value of the display to the new specified
* value. If the new value is less than zero or over the
* limit, do nothing.
*/
public void setValue(int replacementValue)
{
if((replacementValue >= 0) &&
(replacementValue < limit)) {
value = replacementValue;
}
}
/**
* Return the display value (that is, the current value
* as a two-digit String. If the value is less than ten,
* it will be padded with a leading zero).
*/
public String getDisplayValue()
{
if(value < 10) {
return “0” + value;
}
else {
return “” + value;
}
}
/**
* Increment the display value by one, rolling over to zero if
* the limit is reached.
*/
public void increment()
{
value = (value + 1) % limit;
}
}
Test.java that contains main method
public class Test {
public static void main(String[] args)
{
ClockDisplay clock = new ClockDisplay();
clock.setTime(21,01);
System.out.print(“nIn 24 hour format:”);
System.out.println(clock.getTime());
clock.toggleDisplay();
System.out.print(“nIn 12 hour format:”);
System.out.println(clock.getTime());
}
}
Expert Answer
Answer to 4) Describe at least 3 cases that you think we should test if we are trying to determine if the 12-hour/24-hour clock wo…
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